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[INTERSTRAIN DIFFERENCES IN THE PARAMETERS OF SPERMATOGENESIS IN INBRED MICE]
Morfologiia (Saint Petersburg, Russia)
|August 24, 2018
Summary
Spermatogenesis in PT and CBA/Lac mice reveals strain-specific differences emerging during puberty. CBA/Lac mice show lower sperm counts but higher functional capacity, suggesting compensatory mechanisms for fertility.
Area of Science:
- Reproductive biology
- Mammalian genetics
- Spermatogenesis research
Background:
- Spermatogenesis, the process of sperm production, is crucial for male fertility.
- Inbred mouse strains are valuable models for studying genetic influences on reproductive parameters.
- Understanding interstrain variations in spermatogenesis can elucidate mechanisms of fertility and reproductive health.
Purpose of the Study:
- To conduct a comparative analysis of key spermatogenesis parameters in PT and CBA/Lac inbred mouse strains.
- To investigate the emergence and nature of interstrain differences in fertility-related traits from puberty to Day 80.
- To evaluate the functional capacity of spermatozoa in relation to morphological characteristics and motility.
Main Methods:
- Comparative study of spermatogenesis parameters in PT (n=99) and CBA/Lac (n=81) mice from puberty to Day 80.
- Measurement of epididymal spermatozoa count (epididymal reserve).
- Evaluation of sperm morphology, motility, and determination of body, testes, and epididymal weight.
Main Results:
- CBA/Lac males exhibited lower testicular mass and epididymal spermatozoa numbers compared to PT mice.
- CBA/Lac mice demonstrated higher spermatozoa functional capacity, with fewer abnormal forms from puberty onwards.
- Post-pubertal CBA/Lac males showed higher relative concentrations of motile spermatozoa compared to PT mice.
Conclusions:
- Interstrain differences in critical spermatogenesis parameters influencing fertility begin to manifest during the puberal period in laboratory mice.
- Observed variations in spermatogenesis between PT and CBA/Lac strains may represent compensatory mechanisms affecting fertility.
- This study highlights the dynamic nature of reproductive trait development and interstrain variability in mice.
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